It's a part of public API.

The licence was changed from GPL to LGPL with explicit approval from
the original author.

See thread:
Subject: [FFmpeg-devel] [PATCH] lavfi: add rgbtestsrc source,
        ported from MPlayer libmpcodecs
Date: Mon, 11 Jul 2011 16:32:41 +0200

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

The ported filter supports named option parsing and more YUV formats.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

With the following additions:
* support to gray format
* support to yuva420p format
* parametric luma/chroma/alpha radius
* consistency check on the radius values, avoid crashes with invalid values

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This filter is a simple wrapper around the LUT filter.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Some fixes by Stefano.
For detailed authorship see SOC repo

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

With the following additions:
* support to anti-aliased glyph rendering
* support to UTF-8 text and Unicode chars rendering
* support for RGB packed formats
* fix minor errors and typos in the filter description
* extend/clarify examples in the filter description

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Port fade filter from libavfilter soc repo, with minor fixes by
Stefano.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Mans Rullgard <mans@mansr.com>

See thread:
Subject: [PATCH] movie video source
Date: 2010-12-31 15:35:30 GMT

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>

code.

Originally committed as revision 26112 to svn://svn.ffmpeg.org/ffmpeg/trunk

FILTERNAME=ARGS and FILTERNAME:ARGS syntax.

The same filter class will be used for managing all the libopencv
filtering functions.

Originally committed as revision 26079 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by Nolan L nol888 <=> gmail >=< com.

See thread:
Subject: [FFmpeg-devel] [PATCH] Port gradfun to libavfilter (GCI)
Date: Mon, 29 Nov 2010 07:18:14 -0500

Originally committed as revision 25942 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by Baptiste with some fixes by me.

Originally committed as revision 25880 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25855 to svn://svn.ffmpeg.org/ffmpeg/trunk

headers.

Originally committed as revision 25838 to svn://svn.ffmpeg.org/ffmpeg/trunk

aspect ratio.

Originally committed as revision 25800 to svn://svn.ffmpeg.org/ffmpeg/trunk

adopting Baptiste variant which is simpler and faster.

Originally committed as revision 25784 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25657 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25655 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25525 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25447 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25445 to svn://svn.ffmpeg.org/ffmpeg/trunk

Pedagogically useful.

Originally committed as revision 25244 to svn://svn.ffmpeg.org/ffmpeg/trunk

See thread:
Subject: [FFmpeg-devel] [PATCH] Port MPlayer blackframe filter.
Date: Sun, 26 Sep 2010 01:10:40 +0200

Originally committed as revision 25214 to svn://svn.ffmpeg.org/ffmpeg/trunk

Compared to stefanos, 2 frame output works with ffplay.

Originally committed as revision 25196 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by "S.N. Hemanth Meenakshisundaram" /smeenaks/ucsd/edu.

Originally committed as revision 25189 to svn://svn.ffmpeg.org/ffmpeg/trunk

Based on a patch by "S.N. Hemanth Meenakshisundaram" smeenaks!ucsd!edu.

Originally committed as revision 25188 to svn://svn.ffmpeg.org/ffmpeg/trunk

See thread:
Subject: [FFmpeg-devel] [POC] frei0r wrapper
Date: Tue, 24 Aug 2010 21:37:32 +0200

Originally committed as revision 25165 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25118 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24896 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by S.N. Hemanth Meenakshisundaram -af smeenaks,ucsd,edu.

Originally committed as revision 24856 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24806 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24282 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24092 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23046 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23042 to svn://svn.ffmpeg.org/ffmpeg/trunk

Contributed by Daniel G. Taylor (dan/at/programmer-art/dot/org)

Originally committed as revision 22813 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22578 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22573 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21242 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21240 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 20519 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 20446 to svn://svn.ffmpeg.org/ffmpeg/trunk